JO1500B1 - Process for preparing phosphoric acid and calcium sulphate - Google Patents

Process for preparing phosphoric acid and calcium sulphate

Info

Publication number
JO1500B1
JO1500B1 JO19861500A JOP19861500A JO1500B1 JO 1500 B1 JO1500 B1 JO 1500B1 JO 19861500 A JO19861500 A JO 19861500A JO P19861500 A JOP19861500 A JO P19861500A JO 1500 B1 JO1500 B1 JO 1500B1
Authority
JO
Jordan
Prior art keywords
zones
prod
h2so4
caso4
h3po4
Prior art date
Application number
JO19861500A
Other languages
Arabic (ar)
Inventor
أرماند لورنت دافستر
فرانسيس آرثر تيرون
Original Assignee
برايون ديفلوبمنت سوسيته انونيم
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by برايون ديفلوبمنت سوسيته انونيم filed Critical برايون ديفلوبمنت سوسيته انونيم
Application granted granted Critical
Publication of JO1500B1 publication Critical patent/JO1500B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
    • C01B25/225—Dihydrate process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
    • C01B25/226—Hemihydrate process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
    • C01B25/2285—Dihydrate-anhydrite or hemihydrate-anhydrite process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
    • C01B25/229—Hemihydrate-dihydrate process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
    • C01B25/231—Dihydrate-hemihydrate process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Prodn. of H3PO4 and CaSO4 by-prod. comprises reacting Ca phosphate (I), present in a CaSO4-contg. slurry being circulated through a series of reaction zones, with H2SO4 and H3PO4, with sepn. of CaSO4 and extn. of at least part of the H3PO4 prod. The flow rates in the system are defined by: (1) a general circulation rate through at least some zones which is 300-400% of the base flow (A) i.e. the rate of discharge from the reaction zones; (2) a circulation across a vacuum cooling zone of 2000-400% of (A); (3) local circulation in the reaction zones of 500-2000% of (A) and (4) the sum of (1) and (3) is at least 2500% of (A) in each zone where reactants are added and in the immediately following zones. The zones are maintained at 30-105 (pref. 30-90) deg.C, with P2O5 content 15-52%; H2SO4 content 0.25-25% and solids content 15-62 (pref. 20-62)%. Dwell time is 1-23 hr. and the reaction conditions are chosen to provide a prod. acid of 33-52% P2O5 and 0.25-2.5% H2SO4 contents. The by-prod. is dihydrate; anhydrite (II) or hemihydrate, depending on H2SO4/P2O5, concns.
JO19861500A 1985-05-21 1986-02-12 Process for preparing phosphoric acid and calcium sulphate JO1500B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU85906A LU85906A1 (en) 1985-05-21 1985-05-21 Wet process phosphoric acid and calcium sulphate prodn. - with adjustment of flow rates, temp. and concn. to control crystal form of the by=product

Publications (1)

Publication Number Publication Date
JO1500B1 true JO1500B1 (en) 1989-01-25

Family

ID=19730474

Family Applications (1)

Application Number Title Priority Date Filing Date
JO19861500A JO1500B1 (en) 1985-05-21 1986-02-12 Process for preparing phosphoric acid and calcium sulphate

Country Status (2)

Country Link
JO (1) JO1500B1 (en)
LU (1) LU85906A1 (en)

Also Published As

Publication number Publication date
LU85906A1 (en) 1986-12-05

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